US1326713A - Sawing-machihe - Google Patents

Description

E. L. DEAN.

SAWING MACHINE.

APPLICATION HLLD JUNE 8,1918.

m3365213, mmm Dee. 30,1%.,

lq e SHEETS-SHEET l.

E. L. DEAN SAWING MACHINE.

APPLICATION HLED JUNE 8,1918.

1,326,713. Patented Dee. 30,1919.

6 SHEETS-SHEET 2.

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SAWING MACHINE.

APPLICATION F|LEDJUNEB,1918.

1,326,771.30 Patented DQC. 30,12%.

6 SHEETS-SHEET 3.

if A By w l Amm/EVS E. L. DEAN.

SAWING MACHINE.

APPLICATION HLED JUNE 8.1918.

1,32@,'713.Y Patented Dec. 30,1919.

6 SHEETS-SHEET 4.

* x ,4 TTORNEVS E. L. DEAN.

SAWING MACHINE;

APPLlcATioN FILED JUNE 8,1918.

Yatented Dee., 30? i919.

IN1/EN TOR [L Dean 74A/144% TTORNEVS d M x M .L Y

w//VESSES 4 a I Mmm E. l.. DEAN.

SAWING MACHINE.

APPLICATION FILED IUNE 8, 19m.

Patented Dee. 30, MIU.

6 SHEETS*SHEET 6.

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UNITED. sTATEs 4raTiana? oFFroE.

l EDWIN LOUIS DEAN, F SHREWSBURY, MASSACHUSETTS.

sAWING-MACHINE.

Lazerus.

Application led .Tune 8,

To all 'whom z' may concern.' i

Beit known that I, EDWIN LoUrs DEAN, a citizen of the United States, and a resident ofShrewsbury, in the county of Worcester and State of Massachusettes', have invented anew and Improved Sewing-Machine, of which the following is a full, clear, and eX- act description.

Among the principal objects which the present invention has in view are: toI provide a machine of the character mentioned readily adjustable to various working posishipment of timber from the.. Jrbrest-.to the mill. v

\ Drawings.

Figure 1 is a plan view of a machine con? i the' machine, the section being'takenas on the line :5-5 in' Fig. 1; F ig.v 6A 'is agjcietail view on an enlarged scale,- showing'in section a portion of the feeding mechanism, thel section being taken as on the line 6 6 in Fig. l;

Fig. 7 is a detail'view of the adjusting mechanism lfor su porting the machine;

Fig. 8 is a si e view of the machine,

showing the same disposed as in operative.

relation to the :felled timberyshowing the same in theoperatlon of dividing the timber Figa -9 is a plan view "showing the machine as in the Aoperation of trimming the logs for converting the same into beams;

Fig. 10 is an' end view' of the same, showing 1n connection'. therewith the machine Specication of Letters Patent.

'tilted to a position to receive the logs when being trimmed as timben Description.

As seen in the drawings, the machine ernbodies three operatively connected units, to wit, a platform member 15, which is circular 1n shape and provided with an inner circular track groove 16, wherein is mounted a series of rollers 17. The rollers 17 reduce the friction incident to moving the workin frame 18. Theframe 18 is constructed o iiat bars, to support the rails 19 and racks 20. The rails 19 and racks 20 are straight and disposed in parallel relation. The frame 18 also provides tapped openings for the engagement of elongated screws 21. The screws 21 have hand wheels 22 at the extremities thereof, said hand wheels exv tending beyond the sides'of the frame 18.

are four screws 21. These screws are spacedapart so that they can engage the trunk of a tree at suitableI distances on opposite sides of a median plane of the tree. These screws are for stein-dying the structure when the motor is operating the saw blade 23.

The frame 18 constitutes the carrying member on which the sawing mechanism is.

transported. kFor this purpose, the frame 18 is provided with carrying lhandles 24 secured to a side of the said frame.

The platform 15 has a removable section 25, partly forming a central opening 26. The section 25 is removed to permit the platform being vadjusted -in surrounding relation to the tree trunk, as shown in Fig. 1. The section 25 has two pins, one on each side to. prevent said section from drawing out .when screws 28 are tightened.

" .As seen best in Fig. 2 of the drawings, the section 25 has at the 'lateral edges t ereof, dovetailed rails 27, which fit corresponding grooves in the adjacent portion of the platfornrl. The platform 15 is skeleton 1n form and is held in active service to the/tree trunk, by means of the pointed screws 28. The threads of the screws 28 engage threads in housin s 29 pendent from theunder side of the f itform 15. The platform 15 is Yprovid te aid in adjusting the frame Y18,

l Patented Dec. 30, 1919. 191s. seriali No. 238,946.

.which is lifted by means ofthe handles 24 o n to the platform l5 after the screws 28 have been driven into the trunk of the tree. The' rollers 17 assist thereafter in moving the frame circularly about the trunk of the tree4 to adjust the frame to the desired cutting position.

l/Vhen the frame 18 has been thus adjusted, it is steadied by the pegs 30, which, as shown in Fig. 3 of the drawings, are provided with sharpened points to sink into the ground., rli`he pegs 39 have rack sections 31, the teeth whereof engage gear wheels 32, which gear wheels are mounted on stud shafts having wrench ends 33, as seen best in 1 of the drawings. The shafts are provided with ratchet wheels 34, the teeth whereof are engaged by pawls 35. l{Vhen the pegs are driven inte the ground, the machine is held sui'liciently rigid to withstand the vibration of the sawing mechanism.

rllhe sawing mechanism employs a saw blade 23. The blade 23 is clamped in heads 36, as shown best in ldig. 2 of the drawings. The heads 36 are mounted in guide blocks 37 and on the wrist pins 33 thereof are piv otally connected pitman rods 39, which rods are pivotally connected with crank Wheels" 40. rlhe wheels 40 are operatively connected with clutches 42. rlhe shafts 41V are driven by any suitable prime mover, that indicated in the drawings being an electric motor 43. The motor provides a three-speed driving mechanism comprising the pulleys 44, 45 and 45, which are successively connected by a lbelt 46, with driven pulleys 47, 47a and 47b on one of the shafts 41. Provision is made for taking up the slack in the belt 46, employing to' this end, an idler 48 mounted in swinging brackets 49. At the outer ends of the two shafts 41, at lopposite sides of the machine, are pulleys v50, said pulleys being operatively connected by a driving belt 51. The slack in the belt 51 is absorbed by idlers 52, which normally rest above and absorb the slack of the said belt.

From the foregoing, it will be seen that when the motor 43 is energized, the shafts 41 and clutches 42 mounted thereon, and the crank whee140, are rotated in unison by rea-- son of the union of the two shafts through the pulleys 50 and belt 51. The Wheels 40 operate to reciprocate the blocks 37 and the saw 23 connecting the said blocks. Under these circumstances, it is obvious that if the cutting edge of the saw blade 23 be advanced against the tree trunk or other article to be sawed, it is severed bythe said blade. It will be observed that during the operation of the saw blade, it is maintained clear of gum or similar substance by brushes 53, said rushes being arranged as seen best in Fig.

l 2 of the drawings, on opposite sides of the blade, to receive any substance which would tend to adhere thereto.

nasen/1s rlhe rails 19 and racks 20 are employed to advance and retract the frame 18. rllhe rails 19 are wedge-shaped to overhang guiding grooves formed in a runner plate at the outer edges of the frames 54, supporting the sawing mechanism. When the frames 54 are stationary on the fraine 18, the friction wheel 55 is at the neutral or central position of the friction disk 56. 1When it is desired to advance the frames 54 by power, the friction Wheel 55 is shifted over the surface of the disk 56, either to the forwarding or reversing side of the center thereof. The wheel 55 is keyed or splined to a counter'- shaft 57, and is 'moved lengthwise thereof Vby a lever 58. 'lhecountersliaft 57 is driven in'correspondence with the shaft 41, by means of a sprocket chain 59, which, together with sprocket wheels mounted on the shafts 41 and 57, respectively, constitute a transmission mechanism connecting the said shafts. By the ratio of the sprocket wheels,

i. the desired speed of the shaft 57 is account ed for. rEhe lever 58 is shifted over and held in position on a quadrant 60, by a pawl 61, as seen best in Figs. 4 and 6 of the drawings.

Fit grip lever 62 lifts the pawl 61 when it is desired to shift the lever 53.

rthe friction disk 56 is xedly mounted on a shaft 63. The shaft 63 has adjacent the opposite ends thereof, permanently mounted thereon, gear wheels 64, the teeth of which are meshed with the teeth of t e racks 20. rlherefore, as the shaft 63 is rotated With the disk 56, by the Wheel 55, the frames 54 and mechanism carried thereby are advanced and retracted from the working position ofthe sawblade 23 and at a speed corresponding with the engaging p0- sition of the wheel 55 with the wheel 56.l Band brakes 65 operatively engage brake drums 66, fixedly mounted on the shaft 63, adjacent the Wheel 64. The band brakes 65 are operated by bra-ke levers 67.

By means of the braking mechanisms ldescribed, Ithe movement retrogressively or progressively of the frames 54 is controlled. The' frames 54 are structurally united by plates 68. The plates 68 provide bearings forthe shafts 63 and 69, the latter having mounted rigidly at the ends thereof, pinions 70, the teeth of which -pinions are meshed with the teeth of the pinions 71 `with which the shaft 63 is provided. By transmitting the. torque Vstrain' of the shaft 63 from one of the pinions 71 to the other pinion 71, through the shaft 69, torsional bends or fieXure is largely overcome or totally avoided. rl`he sawing mechanismI above described is controlled or initiated and suspended by withholding or permitting the cones 72 vto engage the clutches 42. To this end, the cones 72 are operatively connected byrocking levers 73 and links 74,'witl1 controlling buckle, the clutch devices will automatically slip to take care of the situation. It is obvious that the function of the clutch devices is to provide automatic means to take undue shocks or-strains off of the saw 23.

Operation. When provided with a sawing mechanlsm such as described, the operation is as follows: The platform 15 is first installed and set at the angle or inclination at which the preliminary cut is to be made if starting to fell a tree. ln felling trees, it hask been found desirable to preliminarily form what is known as a kerf. The kei-f is wedge-shaped, the bottom cut` or side being preferably inclined at an angle and the up-y per side horizontal. When the lrerf is removed, a part' of the support of the tree trunk is takenaWay in the direction in which it is desired the tree shall fall. When the platform 15 is adjusted, the points of the screws 28 are driven into the trunk of the tree and the section 25 is rigidly installed so that the groove y15 is complete. The frame 18 is then lifted to position on the platform 15, and at the upper inclined portion thereof. The motor 43 is started, the frame 54 being retracted on the racks 20 and rails' 19 until the blade 23 is clear of the trunk of the tree. When starting the motor, the levers are drawn back so that the cones 72 are Withdrawn from the clutches 42. After the motor has gained sutlicient headway, the cones 72 are permittedto grip the clutches 42 and the saw blade 23 is then vso rapidly reciprocated.

The friction wheels 55 are moved to a neutral or central position on the disk 56, and, if desired, the frame 54 is advanced until the teeth of the blade 23 engages the trunk of the tree.

Either before or at this stage of the opi eration, the pointed ends of the screws 21 are driven into the trunk of the tree so that. the frame 18 is held positively engaged with the trunk of the tree during the remainder of the operation of the machine. l

The lever 58 is now moved to shift the wheel 55 to the side of the disk 57, which will rotate the shaft 63 and-:gear -wheel G4 thereon to advance the frames 54 and the blade 23 toward'the center of the tree trunk.

When the blade 23 has been inserted sufciently far into the tree trunk to form a satisfactory kerf, the operator moves the friction wheel 55 to the reversing side of the disk 56, and preferably to a position thereon to rapidly rotate the wheels 64, and quickly withdraw the blade 23 from the cut which has been performed. "if necessary the frames 54 are arrested by manipulating the levers 67 and the brake band 65. y

To level the inachine'to complete the kerf,

the laterally-disposed screws 28 are held in the gripping position to the trunk of the tree, while the longitudinally disposed crews 28 are retracted to release the tree.`

This forms of the first two screws, pivots on which the platform 15 and parts supported thereby can be swung to a horizontal position. When the platform has been swung to this position, the screws 28 previously loosened are retightened so that the platform l5 is held stationary, and the saw blade 23 will be found in osition to perform a horizontal eut which when completed, will form the top cut of the kerf.

The sawing operation is resumed until the blade 23 has completed the cut for the kerf, when again the operation of the wheels 64 is reversed and the sawing machine retracted until the blade'clears the tree trunk. The wedge-shaped block is now removed from the kerf, and the screws 21 are retracted from engagement with the trunk of the tree. The frame 18 is now swung around the cenvter of the trunk and around the platform 15 in the groove 16 and on the rollers 17 therein until the cutting position of the machine is reversed from that in which it made the kerf cuts. When thus positioned, the screws 21 are driven rmly into the trunk of the tree and the pegs 30 are driven into the ground.

As the tree is to be felled while the sawing mechanism is in this position, the platform 15 is removedleaving the frame 18 and sawing mechanism mounted thereon supported by the pegs 30. To remove the platform 15, the screws 28 are retracted, the section 25 is removed and the platform is then taken from the tree trunk.

Preparatory to felling the tree, braces 76, such as shown by broken'lines in Fig. 3 of the drawings, are engaged with the trunk of the tree at the far side thereof and suffi ciently high on the trunk to steady or correct any sway which the trunk may have during` the subsequent cutting operation. Preferably, the braces 76 are formed in two parts, the parts 77 being tubular to-'contain the lower portions of the braces, and some means of elongating the combined length of the two parts is employed in the tubular portions 77.

The braces 76 having been installed, the sawing mechanism is operated so that the blade 23 is carried through the tree trunk at the level of the upper plane on which the kerf was cut. As the sawed section of the trunk is weakened, the braces 76-77 are elongated to press the trunk of the tree over toward the kerf out, which ultimately insures the falling of the tree on the kerfed ioo side and in line. with the opened portion of the sawing mechanism or of the frames 18 and 5a thereof. the sawing machine is removed prior to feiling the tree. v

Villien the tree has fallen, the machine is employed for dividing it into logs. To accomplish this, the tree trunk is mounted on horses, such as shown in Fig. 8 of the drawings, wherein the legs 78 are supported at one end by struts 79, and Where the legs 78 are furnished With ratchet bars 80. Long brace pavvls 81 engage the teeth of the ratchet bars 8O to hold lag bars 82 in sup porting relation to the tree trunk, said lag ars 82 forming in conjunction With the le s 78, supporting crutches for the tree troni. The sawing machine including the frame 18 is then lifted above the tree trunk, and the screws 21 and hooks 90a are embedded in the treeJ trunk. erated as above described, the blade 23 being sent through the trunk to sever a log section therefrom. @ne log section having been thus cut, the sawing mechanism is shifted to sever the second log and so on until the trunk of the tree is entirely consumed.

As shown in Fig. 9 of the drawings, the sawing machine further lends itself tothe operation of squaring the logs, thus forming the same int-o timbers When using the sawing mechanism in this vvay, an elongated frame having racks and rails 84 eX- tended the full length of the logs to be cut, is used. rfhis frame employs elongated lag screvvsr 85, Which may beforced into the log to hold the same While cutting is being perllili formed.

As shown best in Fig. 10 of the drawings,

, the log is supported by horses 86,*on which bolster blocks87 are mounted. The bolster blocks 87 have curved saddles 88, shown in dotted lines in. said figure, for supporting the log While it is being cut. The frame is also supplied with the pegs 30 described with reference to the frame 18.A rfofurther brace the elongated frame, brace rods, such as indicated by the numerals 89 and 90, are employed. Tlfese may be of any desired shape and length.

It is obvious that when the frame 54C is placed upon the elongated frame and. on the. legs 83 thereof, the blade 23 is reciprocated and the power being turned on, the frame 54 and savvin mechanism continue to move lengthwise ofthe log until the top slab 91 is removed therefrom. The sawing mechanism is then retracted and the log turned for the removal of the slab forming one of the sides of the completed timben 1. In a machine of the character described, a circular platform provided upon lit will be understood that V rllhe sawing mechanism is op- 4gage the circular track so that said Working-frame may be shifted in a circular path around the tree, said working-frame having an opening upon one side adapted to be arranged near the first named opening, frames arranged upon said Working-frame and being connected to move as a unit trans versely of the working-frame, rotatablel crank elements carried by said frames, a saw having connections with said crank elements to be driven thereby, friction clutches connected with the crank elements to drive them, shafts connected with elements of the friction clutches, driving connecting means between the shafts, and a'prime mover con nected with one shaft to drive it.

2. In a machine of the character described, a circular platform adapted to surround a tree in spaced relation and provided upon one side Iwith an opening for receiving the tree when it falls, a platform section held Within,A the opening of the platform-and adapted. to be removed therefrom, means to clamp the platform and. platform section vwith the tree, said platform and platform section being provided with a circular track, a Workin -frame supported by the platform and platform section and having means to engage the circular track so that said Working-frame may be shifted in a circular path around the tree, said Working-frame having an opening upon one side thereof adapted to be arranged near the first named opening, means to clamp said working-frame to the tree, frames arranged upon said Workingframe and being connected to move Vas a unit transversely of the Working-frame, means to move said frame transversely vof the Working-frame, rotatable crank elements carried by said frames, reciprocatory heads connected with the crank elements to be driven thereby, a saw havin connections with said heads, friction clutc les connected with the crank elements to drive them, shafts connected with elements of the friction clutches, driving connecting means between the shafts, and a prime mover connected with one shaft to drive it.

3. Inl a machine ofthe character den scribed, a substantially circular platfoi'm adapted to surround a tree, a Working-frame supportedby the platform and adapted to be shifted in a circular path around the tree, sawing mechanism carried by the Workingframe, a prime mover to drive the sawing icc p nism toward and away from the tree, said meansbeing adjustable to vary the speed of the shifting movement of the sawing mechanism independently of the speed of the prime mover. v

4. In a machine of the character described, a frame adapted to be arranged near the tree to be out, said frame having its ends extending upon opposite sides of the tree, reciprocatory heads carried by the ends of thev frame, a saw connected with the heads, rotatable crank elements carried by the frame and connected with the heads to move them, friction clutch devices connected with connected with elements of the clutch devices, drivingconnecting means between the shafts, and a prime mover connected with one shaft to drive it. i

5. In a machine of the character described, a frame adapted to be arran ed near the tree tobe cut, said frame having its ends extending upon opposite sides of the tree, rotatable crank elements carried by the' ends of the frame, a. reciprocatory saw, means connecting the saw and the cra-nk elements, friction clutch devices connected with the crank elements to drive them, means to adjust the friction clutch devices, shafts conf nected with elements of the clutch devices to drive them, driving connecting means between the shafts, and a prime mover to drive onel shaft. c

EDWIN LOUIS DEAN.

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